public class Disk {
    private final Disk disk=new Disk();
    private DiskBlock[] diskMemory;
    private boolean hasInit;
    private Disk(){

    }
    private boolean initDisk(int size){
        if(hasInit)
            return false;
        this.diskMemory=new DiskBlock[size];
        hasInit=true;
        return true;
    }
}
